Locomotive-brake



(Nb Model.) I

W. B. GUERNSEY.

LOOOMOTIVE BRAKE.

No. 259,006. Patented June 6, 1882.

' UNITED STATES PATENT OFFIC WILLIAM B. GUERNSEY, OF NORWICH, N. Y.,ASSIGNOR OF ONE-THIRD IO THE TORREY AUTOMATIC BRAKE COMPANY, OF NEWYORK.

LOCOMOTlVE-BRAKE..

SPECIFICATION forming part of Letters Patent No. 259,006, dated June 6,1882, Application filed March 14, 1882. (No model.)

To all whom it may concern Be it known that I, WILLIAM B. GUERNSEY, acitizen of the United States, residing at N orwich, in the county ofOhenango and State of New York, have invented a new and usefulImprovement in Locomotive-Brakes, of which the following is aspecification.

The subject of my invention is a brake in which the shoes are actuatedindependently each by its own steam-piston and retracted by springs. Theinvention thus permits the application of the particular brakesindependently to the frame of a locomotive by simply bolting thecylinders carrying the piston and shoe to a suitable running-gear frameand connectingsteam-pipes therewith for pressure and exhaust.

In order that my invention may be fully understood, I will proceed todescribe it with reference to the accompanying drawings, in which-Figure 1 is a side elevation of a portion of the running-gear of alocomotive, showing two driving-wheels with my improved brake applied.Fig. 2 is a longitudinal section on a larger scale of one of thebrake-cylinders and pistons, showing the shoe and retractingsprings inelevation. Fig. 3 is a rear end View of the cylinder.

A Arepresent brake-shoes B B, pistons to which they are attached; (3 0,cylinders carrying the said pistons, and fixed to the 1000- motive-framein suitable positions to cause the shoes to act on the drivers D D. Thecylinders G are preferably cast' withattachingplates, as shown in Fig.3, adapting them to be bolted to the frame F of the locomotiverunning-gear, as shown in Fig. 1. I

G Gr represent pipes for admitting steam or other fluid to the cylindersO for applying the brakes, and H H exhaust-pipes for discharging thefluid therefrom when the brakes are to be released.

I I represent retracting-springs, secured at one end to the back of theshoe and at the other end to the base of the cylinder, as shown at Fig.2, so that the entire connected device may be applied or removed bodily.

I prefer to fornrthe piston B in the hollow cylindrical shape shown inFig. 2, open at its inner end to the interior of the cylinder, and witha head, J, formed with a cavity to fit the hemispherical boss orprotuberance K on the back of the shoe A, thus constituting a universaljoint for said shoe and permitting it to adjust itself independently tothe tread of the driving-wheel D.

L is a cook or valve for admitting the steampressure through branchpipes G G to any number of the brake-cylinders which may be used in oneconnected system, and M a cook or valve for. opening or closing theexhaustpipe H, which in like manner communicateswith the severalcylinders 0 through branch pipes H.

In the presentillustration I have shown four of the cylinders and theirshoes A, arranged to act horizontally on two driving-wheels, D D, sothat the pressure will be equal on the opposite sides of said wheels.

The exhaust-pipe H is inclined downward toward its discharge-cock M, asshown, so that water of condensation may freely pass off.

In operation I prefer to connect the inletcock L and exhaust M in such amanner that one will be opened and the other closed by a simultaneousmovement, and theinlet L may be opened slightly before the closure ofthe exhaust M, so that the pressure of steam will efi'ectually eject anywater of condensation which may accumulate, especially in cold weather.The exhaust H stands open when the brakes are not in use.

The apparatus may, by suitable appliances, be used equally well with airor hydraulic pressure. v

Having thus described my invention, the following is what I claim as newtherein and desire to secure by Letters Patent 1. A brake consisting ofa pressure-cylinder, a piston contained therein, and a shoe supportedand actuatedthrough the medium of said piston, substantially asdescribed.

2. The combination, with a cylinder and contained piston and a shoesupported and actuated by connection with the said piston,'of springsattached at their respective ends to the cylinder and the shoe for thepurpose of retracting the latter when relieved of pressure.

3. In a brake consisting of a pressure-cyl- 5. The combination of thepiston B, shoes A, and universal joint-bearings J K between them,substantially as described.

6. The combination, with the cylinders C, pistons 13, and shoes A, ofthe supply-pipes G, exhaust-pipes H, and inlet cooks or valves L, anddischarge-cocks M, connected to be operated by a single movement,substantially as described.

W. B. GUERNSEY.

Witnesses:

Oomvms KNIGHT, WALTER ALLEN.

